Decent game. I have to admit, I got really absorbed in it and played tons of hours. It's fun and addicting but definitely not flawless. The medals are weird, some of them (like mining gold and RP points) are easy and quick to get all of them but ones like purchasing goblins get so crazy you'd have to leave your computer on for a week to have enough gold to buy 100 goblins, they get so ridiculously expensive. Also, I got the 75 goblin medal, and yet it didn't unlock. So I believe that medal is broken. Didn't have any other bugs really like some people here are saying with the save data, it was just with that medal (so far).
After a while it becomes a waiting game. Mining gold becomes useless and you end up just leaving the game on waiting for the goblins to rack up millions for one upgrade and for your creatures to respawn so you can go into the battles. The battles are ok, but like others have said it would be useful if you mentioned exactly what each creature was effective against in the bestiary (you seem to mention it here and there when a battle is lost so why not in the bestiary?) Some battles were hard to predict who exactly to throw in as some were easy and quick and some I'd just randomly get my ass kicked. You did fix one thing from the beginning, I noticed, and that was the annoyance of summoning your creatures into battle. The "all" button made it 1000 times easier, before that it was annoying. So good job there.
I've played this game for days now and I just completed the conquering of the west lands, which gets me to believe that I'm not even close to finishing with 4 more lands to conquer, as the medals suggest. So that would require more tedious waiting around and whatnot. Overall, good job with this, I'm not trying to tear you apart in this review I'm just trying to point out the flaws of the game, besides these flaws I really did have fun with it.
PS: Wow I was about to say that before you put the title "prison" under torture chambers, but it looks like you not only fixed that but you added in to each room which exact creature it attracts. Keep making these small edits, man.